Hydraulic valves are mostly made out of cast iron.
Stackable valves are a stacked assembly of the
inlet section
work section
outlet section
Non stackable valves are a 1 piece casting that has been machined to include the ports and features of the stackable valve in one casting.
By simply using longer bolts, the stackable valve can control more cylinders.
inlet section
work section
work section
work section
outlet section
The only limit is the strength of the bolts holding the sections together.
Non stackable valves have fewer places to leak, and usually cost a little less.
There are other features available to each valve, but, these are the features that pertain to Cub Cadets.
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